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The U.S. Democratic presidential candidate revealed her campaign's latest fundraising tool on Twitter Tuesday night: An app that allows supporters to automatically donate to the Clinton campaign every time her opponent, Donald Trump, tweets.

"Show Donald that his unhinged rhetoric comes at a cost. Sign up to donate to Hillary's campaign every time Donald tweets," the webpage, Troll Trump, explains.

If you agree to, "tell Donald why you're sick of his schtick," you have the option of a $3, $5 or $20 daily donation limit. You can also set your own amount.

Users can also customize their own letter to Trump. The default letter reads, "Hey Donald, I pledge to donate [amount] to Hillary's campaign every time you tweet because I'm sick and tired of your hateful comments about the American people. Happy tweeting!"